From 54db2a56a69b2d6ce894f879568a94003472cbf7 Mon Sep 17 00:00:00 2001
From: tv <tv@krebsco.de>
Date: Mon, 17 Jul 2023 09:59:59 +0200
Subject: parts: base64 encode text with too long lines

---
 scripts/parts | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

diff --git a/scripts/parts b/scripts/parts
index ae73c2f..6449a6e 100755
--- a/scripts/parts
+++ b/scripts/parts
@@ -66,10 +66,21 @@ add_part() {(
   contentType="$(file -Lib "$filepath"); name=$filename"
   case $contentType in
     text/plain|text/plain\;*)
-      contentTransferEncoding=8bit
-      content() {
-        cat "$filepath"
-      }
+      max_length=$(awk '
+        length > max_length { max_length = length }
+        END { print max_length }
+      ')
+      if test "$max_length" -le 998; then
+        contentTransferEncoding=8bit
+        content() {
+          cat "$filepath"
+        }
+      else
+        contentTransferEncoding=base64
+        content() {
+          base64 "$filepath"
+        }
+      fi
       ;;
     *)
       contentTransferEncoding=base64
-- 
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